Search for Minicommander in the search box. (If not found try 'Mini Commander' instead of 'Minicommander', or simply go to www.getjar.com/ from ur pc and search for mini commander, get the quick download code and then download it using ur mobile)

Click Minicommander in the search result.

Now click Download Minicommander, It will be automatically installed in your Phone.

Steps in PC:

Download the necessary game or application to your PC.

Let us consider you have downloaded Mario.jar.

Create a folder called 'Mario' (Consider G:\JavaGames\Mario)

Copy the Mario.jar file to the G:\JavaGames\Mario.

Download and install JADMaker in your system.(Note : JADMaker needs .NET Framework 2.0 or above, you can download it from microsoft website)

You can either choose PC studio option or you can choose Mass Storage option. (These options will be provied only if you have selected the option Menu -> Settings -> Phone Settings -> PC Connections -> Ask on Connection)

Copy the folder G:\JavaGames\Mario to your menory card. For example consider you have copied the 'Mario' folder to a folder called 'Applications' in memory card.